Demountable basketball apparatus



y 1951 R. F. MOREY 2,553,105

DEMOUNTABLE BASKETBALL APPARATUS Filed Feb. 25, 1947 3 Sheets-Sheet l Ia 'T L 3 L l" L a J L 3 m L a I L J May 15, 1951 R. F. MOREY DEMOUNTABLEBASKETBALL APPARATUS 3 Sheets-Sheet 2 Filed Feb. 25, 1947 an Image.

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y 5, 1951 R. F. MOREY 2,553,105

DEMOUNTABLE BASKETBALL APPARATUS Filed Feb. 25, 1947 3 Shee ts-Sheet 3lzzvezziofl: kl'ciaamdli'Moreg y,

fli oflneys Patented May 15, 1951 UNITED STATES PATENT OFFICE,

DEMOUNTABLE BASKETBALL APPARATUS Richard F. Morey, Abington, Mass.

Application February 25, 1947, Serial No. 730,707

14 Claims. 1

This invention relates to basketball apparatus and the principal objectof the invention is to provide a structure for supporting the backboardwhich can be quickly installed and removed from a gymnasium or arena inwhich basketball and other athletic games are played and where it isfrequently necessary to clear the floor quickly at the conclusion of thegame or to remove the basketball apparatus and install apparatusnecessary for a diiferent game.

One of the objects of the invention is to provide a basketballapparatus, having a backboard which when in normal playing position istoo high to pass through the usual doorway of an arena, of suchconstruction that upon downward tipping of the backboard and its supportit may be passed through a doorway having a height little or no greaterthan the vertical height of the longest post of the supporting standard.

Another object of the invention is to provide a demountable basketballapparatus which can be readily erected and which, when disassembled canbe stored in a minimum of space.

Another object of the invention is to provide novel coupling means forrapidly and readily assembling or rapidly disassembling the side framesand overhanging backboard supporting members.

A further object of the invention is to provide readily operable meansfor adjustably positioning the backboard accurately in verticalposition.

A further object of the invention is to provide a basketball apparatuscomprising a skeletonized supporting frame for a transparent backboardhaving a basket mounted thereon which will enable the basket and theplayers to be observed, without substantial interference, from anyposition in which the game may be. observed in an arena completelysurrounding the playing field.

These and other objects and features of the invention will more fullyappear from the following description and the accompanying drawings andwill be particularly pointed out in the claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawings, in which,

Fig. 1 is a plan view of the basketball apparatus;

Fig. 2 is a side elevation of the same;

Fig. 3 is a front elevation of the same;

Fig. 4 is an enlarged detail view, mainly in horizontal section, showingthe means for connecting the horizontal tubular bars of a cantileverconstruction for' supporting a basket to the standard of the apparatus;

Fig. 5 is a detail view-partly in horizontal section, of the end portionof one of the tubular tie- 2 beams and the means for connecting the sameto I a tubular side member of the apparatus;

Fig. 6 is a detail plan view of the top reinforce ing assembly for thecantilever members which support the backboard;

Fig. '7 is a plan View of one of the reinforcing assembly members forconnecting t e lower p01- tions of the side frames of the standard andthe. cross bars by means of which the standard may} be anchored to thefloor;

Fig. 8 is a detail plan view of the reinforcing assembly member forsecuring together the ver, tical front posts of the standard;

Fig 9 is an enlarged detail view of the lower end portion of one of therear posts and side girder extending therefrom and the ack m ount.-. edin the rear posts for adjusting'the same ver-. tically;

Fig. 10 is an enlarged detail side view of one of the front postshavingv a caster mounted therein and illustrating a portion of the sidegirder and a foot member extending downwardly therefrom; and, V

Fig. 11 is a perspective detail view of a yoke.- shaped member adaptedto rest upon the cross bars of the bottom reinforcing assembly for thestandard and having a slot adapted to been-H aged by an anchoring memberfor securin the; standard to the floor.

The present invention comprises a skeletoni'zecl Vertical rectan ularstandard with a. forwardlyextending cantilever superstructure upon the;free end of which is mounted a vertical transparent backboard having thebasket mounted di.-; rectly' thereupon instead of u on a non-transparentbackboard or nonetransparent portion thereof, for the purpose ofenabling the basket and the players tov be observed without inter:ference by spectators. v

The present invention comprises a basketball; p us i h can be r dil asem led a d: hen dis bi s sto d n a mi m o pa The basketball apparatus asillustrated in te; c omp n i d aw n s com r s angular verticalskeletonized standard having parallel side frames each includingpermanently assembled parallel vertical tubular front posts I of pr eermi e h ight gr t t the h i 9? a jumping player and vertical tubularrear posts 2 of less height than that of the, posts I having. upwardlyinclined extensions 3 which are rigidly mounted, preferably by welding,upon the upper ends of the vertical posts 2: and preferably havehorizontal integral extensions 4 which project forwardly beyond thevertical posts I. The, front and rear posts of each sidev frame areconnected adjacent their lower endsby a girder 5 the ends of which arepermanently secured, preferably by welding, to the respective posts- Iand 2. Suitablebraces 6 and 1 connect the girder 5 to the the girders,the posts, and other members of the frame construction so that thetubular tie beams can be used interchangeably firmly to connect parallelmembers of the frame structure.

As illustrated herein tubular tie-beams 9, are provided which, as shownin detail in Fig. 5, have end portions in which plugs ID are insertedand fixedly secured to said end portions and extend therebeyond. Each ofthe plugs is provided with a screw which projects beyond the end of theplug and is adapted, to pass through the tubular member of the frame towhich it is connected. The screw is provided with suitable nuts forclamping the tie-beams firmly to the other structural member of theframe.

Asillustrated in Fig. 5 each of the plugs Ill has an internally screwthreaded bore II in which a screw I2 is mounted, the portion of thescrew extending beyond the end of the plug preferably being providedwith screw threads 13 of reverse pitch. The end of the plug isprovidedwitha surface 14 which conforms to the contour of the memberwhich it abuts.

Preferablyv each of the .members of the construction which areconnectedby the tie-beams, such as the tubular posts I and 2, isprovided with a hole havinga sleeve l5 fitting the hole and welded tothe tubular mem ber, and also closely fitting the end portion of thescrew I2.. Desirablyueach member, which is connected-by the tie-beam,has welded to it a co1lar l6 which telescopically fits the plug ID withthe end of the collar'sufliciently spaced" from the end of the tubulartie-beam to "enable the end I4 of the plug to be tightly clamped uponthe tubular member through which the screw passes by a nut 11 engagingthe'end' of the sleeve I5. In

order to provide a standard of great rigidity a suitable bottom assemblyis provided for connectingthe lower ends of the side frames. The bottomassembly isillustrated in detail in Fig. '7 and'comprises tubulartie-beams 9 as above described which are rigidly connected togetheradjacent their ends by parallel tubular bars [8 and I9 with a series ofparallel cross bars 20 and 2| and 22 which are welded at their ends tothe side bars I9. 9 of the base frame extend through the girders 5 inproximityto the posts I and 2 respectively as shown in Fig. 1 and whenthe nuts I? are set up firmly clamp the lower portions of the sideframes together. v

I A cross'braced frame also is provided to-connect the'vertical frontposts I of the side frame together. A preferred construction which isillustrated in Figs. 3 and 8 comprises an upper tiebeam 23 and a lowertie-beam 24 which are connected near their ends by tubular bars 25 and26 having their ends welded to the bars 23 and 24 with a diagonal bar2'! welded at one end to the junction of the .bars 24 and 25 and at theother end to the junction of the bars 23 and 23, and other diagonal tiemembers 28 and 29 welded at their end s to the central portion of thediag onal bar 21 and to the junctions of the bars 25 and 23 and 24. and26 respectively. This front assembly is detachably secured to thevertical posts by the nuts upon the respective ends of the The ends ofthe tubular tie bars .74. tie-beams and likewise can be readilyassembled and disassembled.

The rear posts 2 are connected at their upper ends by tie-beams 9 asalso are the upper end portions of thediagonally linclinedextension 3 ofthe rear posts 2. r

A suitable superstructure for supporting the backboard is detachablymounted upon and extends forwardly from the upper end portion of thefront posts. This superstructure comprises horizontal tubular cantilevermembers 30 one end of which is provided with a suitable plug or insert3| fixedly secured therein, as shown in Fig. 4, which extends beyond theend of the cantilever member 30 into the horizontal projection 4- oftheupwardly inclined extension 3 of the rearpost 2' and is detachablyse-. cured therein by a wing bolt 32. The cantilever.

superstructure is alsov provided with a brace rod 33 which extends fromadjacent the free end of. the cantilever bar 30 diagonally downwardly avsuitable distanceandis provided with a horizon-. tal end portion 34provided with a similar plug which is telescopically mounted in ahorizontaltubular member 35 which is welded to the vertical post I witha wing bolt 32 detachably connecting them. x v

In order to strengthen and reinforce the cantilever superstructure across braced top assembly similar to the front assemblyis provided toconnect the horizontal cantilever bars 30 of the superstructure. v Thisreinforcing top, assembly is illustrated inFigs. 1 and 6 .and comprisesa a rectangular frame having tie-beams 36 and 31 of the characterdescribed having plugs provided with screw threads which extend throughthe respective cantilever members 30 and are clamped therein by nuts I!as above described, and side,

bars 38 and 39 welded at their ends to the tiebeams 36, 31. Suchrectangularframe is braced by a cross rod 40 which is welded at one endto the junction of the tie-beam3'l and side bar 38 andat the other endto the junction of the tiebeam 33 and the side bar 39, and is furtherbraced by the cross rods 4| which are welded at their inner ends to thecross rod 40 and at their outer ends to the junctions of the tie-beamswith the side bars 38, 39, respectively.

The free ends of the cantilever members 30 have welded to them verticalL-shaped brackets 42 having at their lower ends horizontal flanges andL-shaped members 43 are pivotally mounted on bolts 44 extending throughthe members 42 and 43 thereby providing a pivotal connection, Thebackboard 45 is,;pro'vided with suitable end brackets 46 which aremounted upon the L-shaped,

members 43. Braces 4? connect the upper por-! tion of the backboard tothe horizontal cantilever members and serve to hold the backboard invertical position. r

The backboard comprises a vertical wholly transparent rectangular platesurroundedby a metal frame which is integrally connected to the endbrackets 46 so that when the braces 41, which are detachably connectedto the backboard and cantilever members 30, are removed the backboardmay be folded down upon the cantilever construction, or alternativelycan be removed by detaching the bolts 44.- I 1 The basket 48 is carriedby a bracket 49 which is fixedly secured .by bolts 50 and 5| to a metalplate 52 which engagesthe rear surface of the transparent backboard Asabove stated, one ofthe objects of the invention is'to provide means toenable the basket;

ball apparatus to be trundled. upon thefi'oor; In order toaccomplish/thispurpose casters 5.3," are mounted upon the lower ends ofthe front posts I with the spindles 54. of the casters extending into:and secured within the lower ends of the posts.

When in use the rear portion of the standard would be firmly secured tothe floor. When it is desired to remove the basketball apparatustherear, portion of the standard would be released from the floor and thesuperstructure pulled downwardly thereby swinging the standard andcantilever projecting therefrom about the casters as pivots until theupper edge of the backboard isfiush or below the thenupper ends of theposts. By reason of the vertical inclination of the extension 3 of therear posts the vertical'heightof the apparatus would be somewhat lessthanvthe vertical height of the front-post when in. vertical positionand the apparatus therefore could pass through a doorway the height ofwhich did not exceed that of the vertical height ofthe front posts.

Desirably legs 55; which are secured to the. girder 5 in proximity tothe casters, are provided with feet 56 of frictional. material, suchas'rubber,.which when the standard is 'in erected position will lift thecasters slightly from the floor, thereby to aid in preventing sidewiseslipping of the apparatus.

In order to enable the standard to be tilted in such manner as to insurevertical positioning. of the backboard suitable jacks are provided atthe rear of the standard, as illustrated in Fig. 9. In the constructionillustrated the lower ends of the rear posts 2 have secured to theminternally screw threaded collars. 51 which. are engaged by jack screws58 which are rotatably mounted in suitable bearings 59 provided withfeet 60 of antifriction material, the screws 58 being provided with anarm El by' means of which the screws can be rotated. By so actuating thejack screws as to raise or lower the rear end of the standard thebackboard can be accurately positioned vertically for use in playing thegame.

Any suitable means may be provided for anchoring the standard to thefloor. In theconstruction illustrated yokes are employed comprising acentral fiat section 62 and concavely curved end portions 63 adapted tobe placed upon the transverse cross bars 20 and 2| of the bottom frameassembly. The fiat section 62 is provided intermediate of its lengthwith a slot 64 adapted to be detachably engaged by the threaded stern ofthe usual eye-bolt and hook connection which are anchored to the floor,the nuts upon the eye-bolt being set up to clamp the rear end of thestandard firmly in place.

The cross bar 22 may also be used to support such weights as might benecessary firmly to counterbalance the weight of the superstructure andhold the standard more firm-1y in engage-- ment with the floor.

By reason of the construction above described the entire basketballapparatus can be readily disassembled by detaching the cantileverconstruction from the standard then unscrewing, the nuts upon the endsof the several tie-beams; thereby enabling the side frames of thestandards to be stored vertically against a wall, the cantilever membersof the superstructure, the bottom assembly, front assembly, topassembly, and backboard to be placed alongside the standards and theseveral tie-beams assembled therewith in such manner as to occupy aminimum of 6'. space. The basketball apparatus can be readily erected bya reverse operation in which when the standard has been assembled andthe cantilever superstructure attached thereto it can be tilted mentofparts may be made within the spirit and scope of the following claims.

Having thus described the invention, what is claimed as new. and desiredto be secured by Letters Patent is:

l. A basketball apparatus comprising a rec-1 tangular skeletonizedstandard comprising two parallel side frames, each side frame includinga vertical front post, a rear post parallel theretov and a horizontaltubular girder permanently connecting the lower portions of the frontand rear posts, the rear post of each side frame being relativelyshorter than the front post and having an upwardly inclined extensionprovided with a horizontal end portion mounted on and welded to theupper end of the corresponding front post and projecting therebeyond,suitably spaced horizontal tubular tie-beams having ends abutting andfitting the respective tubular members. of the side frames, means fordetachably securing the ends of said tie-beams to said side framemembers'a forwardly extending cantilever super structure detachablymounted on said standard and extending horizontally forwardly from therespective front posts thereof. well above the jumping height of playersusing said basketball apparatus, and means on the free ends. of saidsuperstructure for detachably supporting. a vertical backboard.

2., A basketball apparatus comprising a rectangular skeletonizedstandard com-prising two parallel side frames, each side frame includinga vertical front post, a rear post parallel thereto, a horizontaltubular girder permanently connecting the lower portions of the frontand rear posts, the rear post of each side frame being relativelyshorter than the front post thereof and having an upwardly inclinedextension provided with a horizontally extended portion welded, to

the upper end of the corresponding. front post and projectingtherebeyond, and suitably spaced horizontal tubular tie-beams of equallength con-- necting said side frames having plugs fixedly mounted inthe ends thereof and projecting therefrom having concave ends fittingthe respective members of the side frames abutteol thereby and a screwmounted in each plug extending through the abutting side frame member,and a nut on said screw detachably clamping the side frame member to thetie-beam.

3. A basketball apparatus comprising a rectangularskel'etonized'standard having twoparallel side frames, each side frame.including a vertical tubular front post, a rear post parallel to thefront post and a horizontal girder permanently connecting the lower endportions of the front and rear posts, the rear post of each side framebeing relatively shorter than the front post and having an upwardlyinclined extension rigidly mounted on the upper end of the correspondingfront post, suitably spaced horizontal tubular tie-beams with plugsfixedly mounted therein and projecting therefrom having concave endsfitting the respective members of the side frames abutted thereby and ascrew mounted in each plug extending through the abutting side framemember, a collar welded to the side frame member fitting the plug, asleeve surrounding said screw extending through and welded to the sideframe member, and a nut on said screw engaging the end of said sleeve.

4. A basketball apparatus comprising a rectangular skeletonized standardhaving two parallel side frames, each including a vertical tubular frontpost, a rear post parallel thereto, and a horizontal tubular girderrigidly connecting the lower end portions of said front and rear posts,the rear post being relatively shorter than the front post and having anupwardly inclined extension provided with a horizontal end portion whichis rigidly mounted on the upper end of the corresponding front post andprojects there- 'beyond, a rigid rectangular base assembly connectingsaid side frames having spaced tubular front and rear tie-beams abuttingand detachably connected at their ends to the girders-of said sideframes in proximity to the front and rear posts, tubular side barsrigidly connecting the end portions of said tie-beams, and a pluralityof suitably spaced cross bars parallel to and in proximity to said reartie-beam welded at their ends to said tubular side bars, and acantilever backboard support detachably connected to and extendingforwardly from the upper end portions of the front post's.

5. A basketball apparatus comprising a rectangular skeletonized standardhaving two parallel side frames, each side frame including a verticaltubular front post, a rear post parallel to the front post, and ahorizontal tubular girder rigidly connecting the lower portions of saidfront and rear posts, the rear post being relatively shorter than thefront post and having an upwardly inclined extension rigidly mounted onthe upper end of the front post and extending horizontally therebeyond,a rigid rectangular base assembly connecting said side frames havingspaced tubular tie-beams of equal length abutting and detachablyconnected at their ends to the girders of said side frames in proximityto the front and rear posts, tubular side bars rigidly connecting theend portions of said tiebeams, and a plurality of suitably spaced crossbars in proximity to said rear tie-beam welded at their ends to saidtubular side bars, a yoke detachably mounted on said cross bars havingmeans adapted to be detachably engaged by a floor anchorage, and acantilever backboard support detachably connected to and extendingforwardly from the upper end portions of the front posts.

6. A basketball apparatus comprising a rectangular skeletonized standardhaving two parallel side frames, each side frame including a verticaltubular front post, a rear post parallel thereto and a horizontaltubular girder rigidly connecting the lower end portions of said frontand rear posts, the rear post of each side frame being relativelyshorter than the front post and having an upwardly inclined extensionwelded tothe upper end of the front post and presenting an end portionprojecting horizontally beyond said front post, and suitably spacedhorizontal end portions of the upwardly inclined sections of the rearpost extending forwardly from the respective front posts thereof, andbackboardsupporting means on the free ends of said superv structure fordetachably supporting a vertical backboard, a front frame assemblyconnecting the front posts comprising a diagonally, trussed rectangularframe having tubular upper and lower transverse tie-beams with endsabutting and fitting the respective front posts with screws extendingtherefrom through the respective posts, and nuts on said screwsdetachably engaging the" respective posts.

'7. A basketball apparatus comprising a rectangular skeletonizedstandard having two parallel side frames, each side frame including avertical tubular front post, a rear post parallel to the front post anda horizontal tubular girder rigidly connecting the lower end portions ofthe front and rear posts, the rear post of each side frame beingrelatively shorter than the front post and having an upwardly inclinedextension rigidly mounted on the upper end of the corresponding frontpost and projecting horizontally therebeyond, suitably spaced horizontaltubular tie-beams of equal length detachably connecting,

the posts and girders of the side frame, a for- V and a top framereinforcing assembly detachably connecting the horizontal tubularcantilever members comprising a diagonally trussed rectangular framehaving tubular front and rear tie-beams with ends abutting and fittingthe respective tubular members with screws extending therefrom throughsaid members and nuts on the ends of said screws.

8. A basketball apparatus comprising a rectangular'skeletonized standardhaving two integral parallel side frames each including a vertical frontpost having a rolling contact with the supporting floor and a relativelyshort extensible rear post having an upwardly inclined extension weldedto the upper end of the front post and projecting horizontallytherebeyond and a girder connecting the lower end portions of the frontand rear posts, means connecting said side frames, a cantileversuperstructure forming abackboard support extending horizontally fromsaid extensions, a backboard mounted vertically on the free end of saidcantilever, anchoring means mounted on the rear portion of saidstandard, the relative lengths of said front and rear posts, theinclination of the rear post extension and the height of the upper edgeof the backboard being such that when the standard is tipped forwardlyabout the lower ends of the front posts as a fulcrum, the backboard andthe support therefor will be lowered suniciently to enable the apparatusto pass beneath a door lintel or beneath a vertical obstruction of aheight, from the floor not exceeding the vertical height of the frontposts 9.. A basketball apparatus comprising a rectangular skeletonizedstandard having two parallel permanently assembled side frames, eachside frame including a vertical tubular front post having a rollingcontact with the supporting rear post of substantially less height thanthat of the front post provided with an upwardly and forwardly inclinedextension having a horizontal end portion resting upon and welded to theupper end of the front post and projecting forwardly therebeyond, and alower horizontal girder fixedly connecting the lower ends of the frontand rear posts, suitably spaced horizontal tie beams of equal lengthrespectively extending transversely between the front posts, the rearposts and the horizontal girders of the side frames and connected attheir ends thereto, a long skeletonized cantilever construction havingtubular horizontal members telescopically and detachably connected tothe horizontal end portions of the inclined extension of the rear posts,tie bars detachably connecting the horizontal tubular members of thecantilever construction, means for mounting a backboard upon the freeend of the cantilever construction, and means for 1::

detachably anchoring the rear portion of said standard to the floor,whereby upon release of said anchoring means the standard may be tippedforwardly about the lower ends of the front posts as a fulcrum therebylowering the cantilever construction sufficiently so that the entireassemblage can be rolled beneath the lintel of a door or beneath anoverlying structure of substantially less height from the floor than thevertical height of said front posts.

10. A basketball apparatus as defined in claim 9, in which the verticalposts are provided a suitable distance from their upper ends with ashort horizontal tubular member extending in parallelism with thehorizontal tubular members of the cantilever construction, and bracessecured to the end portions of said horizontal cantilever memberstelescopically and detachably connected to the short tubular membersextending from said front posts, the horizontal members of the bracebars pivotally and detachably connected at their ends respectively tothe upper portion of the frame and to the horizontal members of thecantilever construction at a suitable distance therefrom, whereby saidsupporting frame can be folded down upon the cantilever supportingstructure.

12. A basketball apparatus as defined in claim 11, in which the tie rodsconnecting the members of the side frames are detachably secured to therespective members thereof thereby enabling the standard to bedismantled for convenient storage.

13. A basketball apparatus comprising a rectangular skeletonizedstandard having two parallel side frames, each including a verticaltubular front post, a rear post parallel to the front post and ahorizontal tubular girder rigidly connecting the lower portions of thefront and rear posts, the rear post of each side frame being relativelyshorter than the front post and having an upwardly inclined extensionrigidly secured to and mounted on the upper end of the correspondingfront post, said inclined extension presenting an end portion projectinghorizontally beyond the front post, suitably spaced horizontal tubulartie-beams of equal length connecting the girder of one side frame to thegirder of the other side frame, a forwardly extending cantileversuperstructure having horizontal tubular members telescopically engagingand detachably secured to the horizontally projecting portions of saidrear post extensions, and an inclined strut connected at its outer endto the outer end portion of each horizontal tubular member of thecantilever superstructure and detachably connected at its inner end tothe corresponding front post.

14. A basketball apparatus having provision for a clear vision of thebasket from any spectator position whether in the front or in the rearof the basket, said apparatus comprising a skeletonized standardrectangular in a horizontal direction and presenting two parallelpermanently assembled skeleton side frames, each side frame presenting avertical front post of greater height than the jumping height of aplayer in action, a rear post parallel to the front post, and horizontalgirders rigidly connecting the lower portions of said posts, the rearpost of each side frame being of less height than the front post thereofand having an upwardly and forwardly inclined extension presenting atits upper end a forwardly extending horizontal end portion which iswelded to the top of the corresponding front post and extendingforwardly therebeyond, tubular tie-beams rigidly connecting the two sideframes, a backboard-supporting superstructure comprising two relativelylong forwardly extending horizontal cantilever members, one memberdetachably secured to the forwardly extending horizontal end portion ofeach rear post, means rigidly connecting said cantilever members, abackboard-supporting frame hingedly connected at its lower edge to theends of the cantilever members and a transparent, basket-supportingbackboard mounted in said frame, said cantilever members being of alength to position the backboard supporting frame a considerabledistance beyond the front posts and presenting a minimum of interferencewith the view of the basket through the transparent backboard byspectators located in the rear of the backboard.

RICHARD F. MOREY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 533,320 Rieckert Jan. 29, 1895785,982 Smith Mar. 28, 1905 842,641 Fernau Jan. 29, 1907 1,181,631 BaumMay 2, 1916 1,309,806 Medart Jan. 15, 1919 1,346,240 Noelting July 13,1920 1,757,350 Wallace May 6, 1930 1,832,801 Wright Nov. 17, 19311,924,811 Schulz Aug. 29, 1933 1,972,997 Junkers Sept. 11, 19342,018,250 Cohan Oct. 22, 1935 2,144,148 Gross Jan. 17, 1939 2,227,310Hoppes et a1. Dec. 31, 1940

